Cotter-pin expander and puller



Jul 1,1924.-

J. M. SEDIVEQ CUTTER PIN EXPANDER A ND FULLER Filed Aug. 14. 19523 wag1711M SediI/ec v INVENTOR wrrNssEs Xmgrnfm m, v

ATTORNEY Patented July 1, 1924.

JOSEPH M. SEDIVEC, OF MAY, IDAHO.

COTTER-PIN EXPANDER AND FULLER.

Application filed August 14, 1923. Serial m. 657,293.

To all whom it may concern:

Be it known that I, Josnrn'. M. SEnIvEc, a citizen of the United States,residing at May, in the county of Lemhi and State of Idaho, haveinvented a new and useful Improvement in Cotter-Pin Expanders andPullers, of which the following is a specifi' cation.

This invention relates to improvements in devices for expanding andpulling cotter pins. I

The object is to provide a device of this character embodied in a singletool which may be readily handled by one hand and manipulated to spreador expand-the split end of a cotter pin so as to retain the same inplace, the device being readily introduced into active position and bythe simple pressure of the hand, as in the operation of ordinary pliers,ca used to function in the desired manner, 4

Another object is to provide a tool that may be easily and quicklyapplied in position for extracting or pulling the cotter pin from itsposition at the end of a bolt or else where.

A full and complete-understanding of the invention may be obtained froma consideration of the following detailed description, taken inconnection with the accompanying drawing forming a part of thisspecification, it being understood that while the drawing shows apractical form of the invention, the latter is not to be confined tostrict conformity with the showing thereof,

but may be changed or modified, so long as such changes or modificationsmark no material departure from the salient features of the invention,as specifically pointed out in the appended claims.

In the drawing, in which similar reference characters designatecorresponding parts throughout the several figures:

Figure 1 is a side elevation of the im proved cotter pin expander andpuller; and Figure 2 is a top plan view of the same.

i The general formation andv shape of the improved device is similar toan ordinary pair of pliers, such as are in common use, the principaldifierence residing in the fact that the pressure of .the hand, in. thepresent device, causes a separation of the active till jaws, whereas, inthe case of the pliers the reverse is true, the jaws of the same being 11596, to approach each other i h m re pressure of the hand.- p Y To.secure this desired coac'tion of the aws, the devlce comprises a pairof sinuously curved levers 1, each terminating, at-

one end in outwardly diverging, curved handles 2, having their outersurfaces round ed and knurled as at 3, so as to bereadily,

grasped and operated by the thumb and fingers of one hand without injurythereto.

At an intermediategioint pf gell lengths,

in t io essto msthe levers are reduce vide opposite, interfittingrecesses 4, w ich or less force depending on the amount of fit eachother when the levers areplaced in operative relation toeach other, andthus provide a uniform thickness of the tool throughout its length, asshown in Figure 2 of the drawing.

Adjacent tothe handle portions of the levers, each is provided with anyenlarged,

circular .bearingdisc or plate 5, having alined perforations for thereception of a pivotal bolt 6,the said discs, as well as the oppositeinner faces of the recesses-4 fitting fiat against each other when thelevers are operated.

Each

lever, at its intermediate 1 portion, 1 where provided withtherecess 4,is out' wardly bowed and provided with a return bend, and the recessedbowed portions cross each other and terminate in elongated taper- 4 ingjaws 7,"which are of the full.w1dth' of the levers and are in verticalalinement with each other, so that their opposed, flat inner surfaces 8fit fiat against'each other in the same manner asthe active jaws of anordinary pair of pliers. It will be-noted that the levers cross eachother at two points, and at the first crossing handles arefulcrumedto'get er.

The lips 9 of the jaws are ta cred down to a chiseledge extending thewidthof the jaws, and are thus adapted to be readily introduc 'betweenthe a j a cotter-p n-, as clearly shown in Figure of the drawin and itwill be scent at a pressure on towards each other, the jaws 7 are causeseparate, by reason-of the double crossingo 106 the levers, which bringsabout theforcing apart of the said ends 10 of the cotter pin to causethe same to be retained in its pos1- tion. v

A preferably .U-shaped leaf sp ring 12 is. located between the handle 2,wlthitsbent 1.10

oint from' the acent ends 10 of.

1 y e handles 2 to force the same.

portion adjacent to the opposite discs and the terminals of said springlocated adjacent the ends of said handles, so that the tendency of thespring is to cause a separation of the handles, the result being to holdthe jaws in contact with each other, so that no action of the hand ofthe operator is position in the aperature of the .bolt 11, such pullingaction causing the spread ends of the cotter pin tobe forced togethersuiliaws having flat inner .faccs abutting each cientlyto permit thepinto be extracted.

In order to'prevent "the leaf spring .12 from becoming dislodged fromits position between thelever's, a rivet 15 is preferably applied'to oneof its terminals to secure the same to the adjacent inner face .of thejaw.

""Eronr the foregoing it will be seen that a simple, cheaplymanufactured." strong and durable device has been provided for applyingand removing cotter. pins, and which dles, said levers being outwardlybowed at hand being'directed in a manner may be readily operated by onehand for the purpose, the entire. gripping force of the to force theends of the said pins apart.- It will be also seen that the hook 13 maybe readily engafged in. the eye of the cotter pin, the latter turned sothat the lips of the jaws may bear against the nuts when the device maybe used in the manner o'f-a lever of the first class to pull the'cotterpin out of its seat;

What is claimed is 1-. A cotter .pm expanding device, comprising a pairof'sinuously curved levers,

or some other adjacent part,

said spring means. the extremities of the jaws being tapered to anedgeextending the full width of the jaws.

,\ cotter pin expander comprising a pair of intermcdiately fulcrumedlevers having diverging handles at one end, a spring for normallyscparating'said handies, said levcrs being outwardly bowed at one sideof the fulcrum and having return bends tcrn'iinating in elongated,tapered other, and chisel-edge lips, said levers each,

having interfitting recesses where they cross each other to provide atool of uniform width.

- 3. A cotter pin expander and pullef-comprising a pair ofintermediately fulcrumed levers having diverging handles at one end, aspring for normally separating said hanone side oi the fulcrum andhaving return bends terminating in elongated, tapered jaws having fiatinner faces abutting each other, and chisel-edge lips, said levers eachhaving interlitting recesses where they cross each other to provide atool of uniform width, and one of said jaws having a longitudinallydisposed hook to engage the eye of a cotter pin for extracting the same.

In testimony, that I claim the foregoing as my own, I have heretoailixed my signature.

I JOSEPH M. SEDIVEC.

